关键词: 分数阶傅里叶变换, 数字图像, chirp噪声, 滤波

Abstract: A method based on fractional Fourier domain removing the chirp noise of digital image is proposed, as the traditional filtering methods are difficult to realize signal-noise separation effectively. This method is a new measure to improve the quality of image. It introduces fractional Fourier domain filtering algorithm of chirp signal into the process of digital images. The simulation results show that, for this particular image interfered by chirp noise of degradation model, compared with the common Fourier domain filter and Linear smoothing filter, adopting the Fractional Fourier Transform filter under the best estimate has a better effect of recovery. This method can remove the chirp noise of digital image effectively.

Key words: fractional Fourier transform, digital image, chirp noise, filter